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 Post subject: Re: Catapult Saturday II
PostPosted: Tue Feb 24, 2009 11:48 am 
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Location: NE Minneapolis
this stuff is pretty tough. dunno what it's like under load, but think guitar string, except i can't break it. (smallest guitar string is pretty easy to snap)


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 Post subject: Re: Catapult Saturday II
PostPosted: Tue Feb 24, 2009 11:55 am 
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metis wrote:
this stuff is pretty tough. dunno what it's like under load, but think guitar string, except i can't break it. (smallest guitar string is pretty easy to snap)


Yeah that probably wouldn't break, when I was asking about it I was thinking of using 30-40 gauge nichrome (battery powered even), but deflection could still be a issue. That's maybe less of a problem for freehanding, my application uses guides.

I'll see what I can find and we can decide which to use on Sat.

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 Post subject: Re: Catapult Saturday II
PostPosted: Tue Feb 24, 2009 12:04 pm 
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Location: Eagan, MN
You'd be setting up the wire rig kinda like an old-fashioned bucksaw, right? H-shaped wood frame, with hot wire at the bottom & turnbuckle at top for tension adjustment?

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 Post subject: Re: Catapult Saturday II
PostPosted: Tue Feb 24, 2009 12:08 pm 
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Theo wrote:
You'd be setting up the wire rig kinda like an old-fashioned bucksaw, right? H-shaped wood frame, with hot wire at the bottom & turnbuckle at top for tension adjustment?


Yeah, I'm thinking threaded rod an wing nuts, but yeah.

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 Post subject: Re: Catapult Saturday II
PostPosted: Tue Feb 24, 2009 12:21 pm 
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noise wrote:
I'm thinking threaded rod an wing nuts

Same concept but easier to tighten. I like it.

(Probably want to sleeve the threads somehow, where they pass through the frame on the wing-nut end of the rod, so they slide & don't bite into the wood as you tighten.)

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 Post subject: Re: Catapult Saturday II
PostPosted: Tue Feb 24, 2009 5:57 pm 
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Location: Minneapolis, MN
i think one of the issues for the foam sculpting will be scale - relative to the yet to be completed spoon.

also: anyone have butcher paper? or something decent for sketching out these things to scale.


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 Post subject: Re: Catapult Saturday II
PostPosted: Tue Feb 24, 2009 6:14 pm 
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Theo wrote:
(Probably want to sleeve the threads somehow, where they pass through the frame on the wing-nut end of the rod, so they slide & don't bite into the wood as you tighten.)


Yeah I was thinking that too. I'll try it without and see how it goes.

I have the frame together and just went out to get the transformer, etc.

Makes me kinda nervous to be working with wall AC.

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Last edited by Theo on Tue Feb 24, 2009 6:15 pm, edited 1 time in total.
fixed nested quote


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 Post subject: Re: Catapult Saturday II
PostPosted: Tue Feb 24, 2009 8:53 pm 
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Nicholas Lee wrote:
i think one of the issues for the foam sculpting will be scale - relative to the yet to be completed spoon.

also: anyone have butcher paper? or something decent for sketching out these things to scale.

metis should have some laying around.


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 Post subject: Re: Catapult Saturday II
PostPosted: Thu Feb 26, 2009 8:56 pm 
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I finished the hot wire foam cutter, works great! I just wired it up with mechanics wire for testing, glows red in less than a second and is easily controllable with the dimmer.

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 Post subject: Re: Catapult Saturday II
PostPosted: Thu Feb 26, 2009 9:20 pm 
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Awesome! Michael & I got the 'pult frame tightened up and battened down today (yeah I actually drove to his place & back in all that blizzard crap, not fun) and now the spoon veneering is next.

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